This document provides information about circles and various circle concepts. It defines a circle and discusses key terms like radius, diameter, chord, tangent, secant, and segment. It also provides formulas for calculating the circumference, area, sectors, and arcs of a circle based on the radius. The document serves as an educational reference on topics related to circles.

2. AREA OF CIRCLE

3. DIAMETER OF CIRCLE

4. RADIUS OF A CIRICLE

5. CIRCUMFERENCE OF A CIRCLE

6. CHORD OF CIRICLE

7. TANGENT OF A CIRICLE

8. SEGMENT OF A CIRLCE

13. 6 TANGENT The Tangent is a line which touches the circumference at only one point. A tangent is always perpendicular to the radius.

16. 9 CIRCUMFERENCE OF A CIRCLE CircumferenceThe circumference of a circle is merely the boundary of the circle or rather its perimeter. It’s defined as: C = 2 × π × r where: C = Circumference, r = radius, and π = 3.1415 ....

17. 10 SECTOR OF A CIRCLE A circular sector or circle sector, is the portion of a circle enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. Its formula is: Converting the central angle into degrees gives: x/360.TT r2

18. 11 AREA OF A CIRCLE The area of a circle (the region occupied by a circle) is π r2 when the circle has radius r. Here the symbol π (Greek letter pi) denotes the constant ratio of the circumference of a circle to its diameter.

20. Circumference of Circle = 2 π x radius where π = = 3.141592...

21. Area of Circle: area = π r2

22. Length of a Circular Arc: (with central angle ) if the angle is in degrees, then length = x (π/180) x r

24. 14 CREDITS ANANT AGARWAL X-B PRANJAL SHARMA X-B RAJ KISHORE SINGH X-B ASHISH SINGH X-B